Combined gas engine and fluid pump



y 0, 1955 D. R. OLSON 2,708,069

COMBINED GAS ENGINE AND FLUID PUMP Filed April 16, 1954 2 Sheets-Sheet 1 INVENTOR. Donald R. Olson FIG-3.- N

May 10, 1955 D. R. OLSON COMBINED GAS ENGINE AND FLUID PUMP 2 Sheets-Sheet 2 Filed April 16, 1954 FIG- M M0 Em 0 R d l O n O D United States Patent COMBINED GAS ENGINE AND FLUID PUMP Donald R. Olson, Spokane, Wash.

Application April 16, 1954, Serial No. 423,603

4 Claims. (Cl. 230-56) This invention is a combined gas engine and fluid pump wherein the gas engine pistons are coupled with the pump pistons by means of rigid reciprocating piston rods.

One object of the invention lies in the provision of a manually portable compressor comprising a pair of parallel powered units, each including a two cycle gas engine and a pumping engine having their pistons connected by rigid reciprocable piston rod and unique means interconnecting the reciprocating rods and including a rotatable fly wheel.

Another object of the invention lies in the provision of a manually portable compressor comprising a pair of parallel powered units, each including a two cycle gas engine and a pumping engine and having their pistons connected by rigid reciprocable piston rods and including a minimum number of moving parts, thus providing a device which is not liable to get out of working order.

Another object of the invention lies in the provision of a manually portable compressor which is inexpensive to manufacture and maintain.

Another object of the invention lies in the provision of a portable compressor comprising a pair of parallel powered units, each including a two cycle gas engine and a pumping engine and having their pistons connected by a rigid reciprocable piston rod for imparting substantially all of the power created by the gas engine for the purpose of pumping fluid.

These and other objects of the invention will become apparent during the course of the following description.

in the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts:

Figure 1 is an elevational view of my improved manually portable compressor having parts broken away for convenience of illustration;

Figure 2 is a view taken at line 22 of Figure 1;

Figure 3 is an end elevation of the device as viewed from the left of Figure 1;

Figure 4 is a skeletal view of the moving parts of the compressor;

Figure 5 is an enlarged cross section of one type poppet valve; and

Figure 6 is a view in elevation showing the distributor associated with the operation of the gas engine.

Referring now more particularly to the drawings, the nurneral 10 indicates the manually portable compressor as a unit which comprises a pair of parallel powered units 1212 each of which includes a two cycle gas engine 13 and an axially aligned pumping engine 14. The engines are provided with conventional cylinders 13' and 14 in which pistons 15 and 16 are adapted to reciprocate and are interconnected, one with the other, by means of a rigid piston rod 17. Each piston rod 17 is provided intermediate its length with a transversely extending journal pin 18 which provides a journal or pivotal connection for the opposed ends of a rock shaft "Ice 19 journaled intermediate its length at 20 on the compressor frame. The rock shaft 19 is provided with a tubular intermediate portion 21 which slidably contains telescopic rods 22 thus allowing for the variations in length of the rock shaft 19 as it oscillates during simultaneous reciprocation in opposed directions of the spaced piston rods 17.

It is obvious from the drawings that the gas engine includes two cylinders, each of which is provided with a conventional spark plug 23 and it will be understood that each cylinder is provided with intake ports through which a suitable combustible and air is supplied and exhaust ports for discharge of the products of combustion.

The cylinders 14 of pumping engine 1414 are provided with suitable intake and exhaust poppet valves, a representation of which is shown in Figure 5, wherein each valve is provided with a valve disc 24 which is adapted to seat in a valve port 25' formed in the head 26 of the cylinder 14 and the valve disc 24 is provided with a valve stem 27 which is urged by a spring 28 toward closing position. It will be understood that a minimal tension of the spring 28 is only provided since the actual differential in air pressure on the inner and outer sides of the cylinder 14 will tend to seat the valve discs 24. As the pistons 15 are shifted in the compression stroke the increase in pressure within the cylinder 14 above that in the exhaust conduits 29 will cause the poppet valve 24 to open and permit discharge of the air under pressure into a suitable retainer tank. As the piston 15 moves in the opposed direction, the valve in dicated in Figure 5 will close by means of the air pressure in the retainer tank (not shown) and the urging of spring 28, while a second poppet valve (not shown) of opposed action will open permitting intake of air into the cylinder 14 from the atmosphere. Each poppet valve is provided with a housing 30 for its protection against dust and to facilitate its operation and arrangement of parts.

To provide for smooth operation of the gas engine it is necessary that a weighted fly wheel 32 be supplied and since the connection of the piston rods 17 is a rock shaft 19 the fly wheel 32 is journaled upon a separate crank shaft 33 having its axis removed from the axis of the journal 29 for the rock shaft 19. The crank shaft 33 forming the journal for the fly wheel 32 is provided with an eccentric throw pin 34 which is disposed offset from the axis of the crank shaft 33 one half the distance of the oscillating throw of the rock shaft 19 at a given point where the pivot pin 35 pivotally units a link 36 with the rock shaft 19. The opposed end of the link 36 is journaled on the throw pin 34 and therefore as the rock shaft 19 is rocked the link causes the crank shaft 33 to rotate and by action of the fly wheel 32 continued action of the parallel powered units is insured.

The crank shaft 33 is provided at its end opposed to the fly wheel 32 with a conventional distributor mechanism indicated in general by the numeral 37 which it will be seen includes the usual breaker points 38, one of which is actuated by means of a cam 39 and the electrical are or impulse is distributed by means of the distributor rotor 40 to the spark plug connector contacts indicated at 41 which lead to the spark plugs 23 thus supplying spark for the operation of the internal combustion engine 12-42.

Having thus described my invention, I claim:

I. A manually portable job compressor comprising a pair of parallel powered units each including a two cycle reciprocal piston type gas engine and a reciprocal piston type pumping engine having their pistons connected by a rigid reciprocable piston rod; a rock shaft journaled intermediate said units and having the ends of the rock shaft secured to cause said piston rods to simultaneously reciprocate in opposed directions; a fly wheel journaled on said compressor at a point axially oflset from and in parallel relation to the journal of said rock shaft; and a link having an end pivotally secured to said rock shaft spaced from the rock shaft journal and its opposed end pivotal'iy connected to said fiy wheel in eccentric relation to the By wheel axis one-half the distance of the length of oscillatory movement of the link pivot on the rock shaft.

2. A manually portable job compressor comprising a pair of powered units each including a two cycle reciprocal piston type gas engine and a reciprocal piston type pumping engine and having their pistons communicated by a rigid reciprocable piston rod; a rock shaft journaled intermediate said units and having the ends of the rock shaft secured to cause said piston rods to simultaneously reciprocate in opposed directions; a fly wheel journaled on said compressor at a point axially offset from and in parallel relation to the journal of said rock shaft; a link having one end pivotaily secured to said rock shaft spaced from the rock shaft journal and its opposed end pivotally connected to said fly wheel in eccentric relation to the fly wheel axis; and an electrical distributor mechanism Lit) 4 driven by said fiy wheel for timing the power stroke of said gas engines.

3. The invention as defined in claim 2 wherein the rock shaft comprises a tubular member journaled intermediate its length for rocking movement, and rods having means on their outer ends for securing to said piston rods and reciprocable axially in said rock shaft.

4. in a manually portable job compressor having a pair of parallel powered units each including a two cycle gas engine and a pumping engine having poppet valves and pistons connected by a rigid reciprocable piston rod; a rock shaft having its ends secured to cause said piston rods to simultaneously reciprocate in opposed directions journaled intermediate said units; a fly wheel journaled on said compressor and operably driven by said rock t; and an electrical distributor mechanism driven by said iiy wheel for timing the power stroke of said gas engines.

References Cited in the file of this patent UNITED STATES PATENTS 1,931,164 Lanning Oct. 17, 1933 

